Overgrown Hooves from Muskoxen (Ovibos Moschatus) of Kangaarsuk (Kap Atholl) Northwest Greenland

Overgrown Hooves from Muskoxen (Ovibos moschatus) of Kangaarsuk (Kap Atholl) Northwest Greenland Technical report no. 41, 2002 Greenland Institute of Natural Resources Title: Overgrown hooves from muskoxen (Ovibos moschatus) of Kangaarsuk (Kap Atholl) Northwest Greenland Authors: Christine Cuyler & Hans S. Mølgaard Translation: Sofia Geisler Funding: Greenland Home Rule, Department of Environment and Nature Series: Technical Report Publisher: Greenland Institute of Natural Resources Cover photo: Fore leg hoof of a 13 year old female muskox from Kap Atholl, Northwest Greenland. Photo: Christine Cuyler ISBN: 87-90024-97-4 ISSN: 1397-3657 Layout & Printing: Oddi Printing Ltd. Number printed: 100 Reference: Cuyler, C. & Mølgaard, H.S. 2002. Overgrown hooves from muskoxen (Ovibos moschatus) of Kangaarsuk (Kap Atholl) Northwest Greenland. Greenland Institute of Natural Resources. Technical report no. 41. 28 pp. Available from: Greenland Institute of Natural Resources P.O. Box 570 DK-3900 Nuuk Greenland Phone: +299 32 10 95 Fax: +299 32 59 57 www.natur.gl Overgrown Hooves from Muskoxen (Ovibos moschatus) of Kangaarsuk (Kap Atholl) Northwest Greenland by Christine Cuyler1 & Hans S. Mølgaard2 1Greenland Institute of Natural Resources, P.O. Box 570, DK-3900 Nuuk, Greenland 2Hunting & Fishings Consultant, Aqqusinersuaq 8, DK-3911 Sisimiut, Greenland Technical report no. 41, 2002 Greenland Institute of Natural Resources 3 Contents Summary . 5 Eqikkaaneq . 5 Sammenfatning . 6 Introduction . 7 Methods . 9 Results . 10 Discussion . 15 Acknowledgements . 16 Literature Cited . 17 Appendix 1 . 18 Appendix 2 . 18 Appendix 3 . 19 Appendix 4 . 20 Appendix 5 . 23 Appendix 6 . 24 Appendix 7 . 26 4 Summary In 1986, 7 muskoxen (5 females, 2 males) were introduced to Kangaarsuk/Kap Atholl (76° 19’ N, 69° 22’ W), Qaanaaq municipality, Northwest Greenland. Hunting has never been allowed. This 1998 study focused primarily on the overgrown hooves of muskoxen at Kap Atholl. Also noted or studied were fat reserves, horn growth, mandible measurements and tooth wear. 14 Kap Atholl muskoxen were collected on 16 & 17 April 1998; 6 adults, 7 sub-adults and 1 yearling. One female was 13 years old; being one of the original animals introduced to Kap Atholl. Hooves on all adults were severely overgrown, e.g., fore hooves 25 to 49 cm long. Hooves on sub-adults were longer than expected, e.g., fore hooves 15 to 27 cm long. Normal adult and sub-adult fore leg hoof length is 16.1 ± 2.0 cm (n = 32). Severely overgrown hooves on the 4 adult bulls did not appear to impede locomotion on the hard surfaced snow. Veterinary examination of animals did not reveal any path- ogenic cause for the deformed hooves. Kap Atholl muskoxen have large body size, excellent teeth and good body condition. They also have dry flaky horns. What causes the deformed overgrown hooves has not been shown, nor any reason for the dry flaky horns. The overgrown hooves and dry flaky horns are likely the result of a common cause. The responsible factor(s) remains to be identified, candidates include, 1) high concentrations of a nutrient in the vegetation, 2) lack of locomotion and abrasion, and 3) a possible genetic inbreeding defect. Eqikkaaneq Umimmaat arfineq-marluk (kulavaat tallimat tiggaallu marluk) Qaanaap Kommuneani Kangaarsummut (76° 19’ N, 69° 22’ W) 1986-mi nuunneqarput amerliartornissaallu siunertaralugu eqqissisimatitaallutik. Umimmaat taakku qanoq innerat Avatangiisinut Pinngortitamullu Pisortaqarfiup Pinngortitaleriffiullu suleqatigiinnerisigut 1998-mi misissorneqalerpoq. Tunuliaqutaasoq tassaavoq umimmaat tamaangaaneersut kukiffaasa naliginnaasumit anginerulerlutik iloqissersimasut naammattoorneqartaler- sut misissuiffiginissaat. Misissuinermi aallaavigineqartut taakkuupput iluatsilluguli ilanngullugu misissorneqarput tunnoqassusiinut, nassuinut, qarngannut kingutaannullu tunngasut. 1998-mi aprilip qiteqqunnerani Kangaarsummi umimmaat 14-it pisarineqarput tassalu inersimasut arfinillit, inuusukaat arfineq-marluk norrarlu ataaseq. Pisarineqartut ila- gaat kulavak ukiunik 13-nik utoqqaatigisoq 1986-mi nuunneqartut ilaat. Inersimasuni tamani kukiffaat isikkumikkut allanngorsimanerat malunnarluarpoq. Assersuutigalugu siulliivini kukiffaat 25-49 cm-terisut angitigaat. Angutivissat arnavissallu inuusunne- rusut kukiffaat ilimagisamit takinerupput 15-27 cm-terisut takitigigamik. Umimmaat siulliivini kukiffaat takissusaat – inersimasuni inuusunnerusunilu – naliginnaasoq tas- saagajuppoq 16,1 +/- 2,0 cm (n=32). Tigganni sisamani kukiffaat allanngungaatsiarsi- manerat apummi manngersumi pangalinnissaannut akornutaarpasinngilaq. Uumasut nakorsaata misissuinerata takutippaa kukiffaat isikkumikkut allanngorsimanerat nap- paammik pissuteqarani allamik patsiseqarsimassasoq. 5 Kangaarsummiittut umimmaat timaat naliginnaasumit anginerupput kingutaat nungullarpiarsimanatik tunnoqarluarlutillu. Tiggaat kulavaallu ilarpaaluisa nassui qulloorsimapput panernerannik nassuiaatissaqarunartumik. Kukiffaasa allanngorsimanerannut nassuisalu qulloorsimanerannut pissutaasinnaasut misissornissaat periarfissaqarsimanngilaq, patsisaasorli ataasiugunarpoq. Sunniuteqar- simasinnaasut misissugassat makkuusinnaapput 1) nerisaasa akuisa ilaasa tiggaat kulavaallu nassuinik kukiffaannillu sunniisinnaasut annertusisimanerat 2) uumasut nikippiartannginnerisa kukiffaannik nungullartitsisarnerat, 3) uumasut avataaneer- sunik akuneqartannginnerisa kinguneranik innarluutinngorsimasinnaanera. Sammenfatning I 1986 blev 7 moskusokser (5 køer og 2 tyre) udsat ved Kangaarsuk/Kap Atholl (76° 19’ N, 69° 22’ W) i Qaanaaq kommune, Nordvestgrønland. Okserne blev fredet for at muliggøre vækst i bestanden. I 1998 gik Direktoratet for Miljø og Natur og Grønlands Naturinstitut sammen om en undersøgelse af bestanden. Baggrunden var de forvoksede klove, som blev observeret hos moskusokser fra dette område. I undersøgel- sen blev der derfor også hovedsageligt fokuseret på oksernes forvoksede klove, men oksernes fedtreserver, hornvækst, kæbemål og tandslidtage blev også undersøgt. Medio april 1998 blev 14 moskusokser nedlagt ved Kap Atholl; 6 voksne dyr, 7 ungdyr og 1 årskalv. En af køerne var 13 år gammel og er en af de “oprindelige” okser, som blev udsat i 1986. Klovene på alle de voksne dyr var meget forvoksede - eksempelvis var klovene på forbenene 25-49 cm lange. Klovene på ungdyrene var længere end for- ventet - de var 15-27 cm lange. Den normale længde for klove på forben af moskusokser er 16,1 ± 2,0 cm (n = 32) for både voksne og unge dyr. De meget forvoksede klove på de 4 voksne tyre forhindrede tilsyneladende ikke dyrene i at løbe på det hårde snedække. Dyrlægens undersøgelser viste, at de misdannede klove må skyldes andre årsager end sygdom. Moskusokserne ved Kap Atholl havde relativt stor kropsstørrelse, meget lidt tandslidtage og gode fedtreserver. Desuden var hornene flækket på en del af okserne, hvilket formentlig skyldes udtørrede horn. Det har ikke været muligt i denne undersøgelse at afdække årsagen(erne) til de misdannede klove og de flækkede horn. Årsagen er muligvis den samme. De mulige ansvarlige faktor(er), som kunne undersøges videre, inkluderer, 1) forhøjede koncentrationer af stoffer i vegetationen, der påvirker vækst af horn og klove hos okserne, 2) manglende bevægelse og dermed nedslidning af klove, og 3) en genetisk indavlet defekt. 6 Introduction Muskoxen (Ovibos moschatus) may once have been indigenous to Kangaarsuk /Kap Atholl in the Qaanaaq region of Northwest Greenland. Extremely old muskox crani- ums, bones and horns have been found in the area (Burnham pers. comm.). In the late 20th Century, however, muskoxen were not present. On July 11th 1986 a total of 7 year- Figure 1. Map of the study area indicating where 14 muskoxen were sampled in 1998. 7 ling muskoxen (2 males and 5 females) were taken from the Kangerlussuaq area and introduced to Kap Atholl. Since their release the muskoxen have been protected by law. By 1990 all of the muskox resided in the Maniisergat Valley, which is also called “Den Grønne Dal” (The Green Valley) (Figure 1). The valley is named for its lush vegetation, which results from the many large colonies of Little Auk (Alle alle) found there. During summer, muskoxen are usually found in the dense grassy areas under the bird colonies. The vegetation there is lawn-like with a deep layer of peat below and few stones to cause chipping or wear on hooves (Burnham 1996). Calving was first reported in 1991, when a group of 7 muskox including 2 calves was seen (Peter Nielsen pers. comm.). Muskoxen were again observed in spring 1993. This time 6 animals, which included calves, were seen deep in the Narsaarsuk Valley (Ole Mathiesen pers. comm.). The Peregrine Fund, working in the Kap Atholl region during July 1994, observed 1 lone bull and a herd of 19 muskoxen, which included 7 calves (Burnham 1996). This sighting was confirmed in August of the same year during an aerial survey completed by the Directorate for Health and Environment (Peter Nielsen pers. comm.). The next year, 1995, 2 lone bulls and a herd of 24 muskoxen, which included 7 calves were seen (Burnham 1996). In the summer of 1996 a herd of 33 muskoxen, which included 8 calves, were sighted in the Maniisergat Valley, and severely overgrown hooves, grown up and around 360°, were noted on many adults (Burnham 1996). The worst affected animals had difficulty walking. Veterinarian Niels Wøldiche Pedersen investigated the situation in November 1996 (unpublished data). He located a herd of about 30 muskoxen, of which 5 to 10 of

Load more